Alert archive / New Jersey / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly

July 14, 1994Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 1994, 6:58 PM EDT for Camden County, New Jersey. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 14, 1994, 6:58 PM EDT (22:58 UTC)
Expired
Jul 14, 1994, 8:00 PM EDT
In force
62 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Camden County, NJ

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 11.0 hours before the alert went out and 56 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Atlantic City In, NJ at 12:00Z on 1994-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 651 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Atlantic City In, NJ at 12:00Z on 1994-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
651 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1094 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPHL 142303
SVRPHL
NJC007-150000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
658 PM EDT THU JUL 14 1994
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS EXTENDED
THE SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH NEW JERSEY
 
   ...CAMDEN COUNTY
 
A SKYWARN SPOTTER JUST REPORTED A WIND GUST TO 62 MPH IN DEPTFORD.
THIS SEVERE THUNDERSTORM WAS MOVING EAST AT 20 MILES AN HOUR AND
WILL BE MOVING INTO CAMDEN COUNTY SHORTLY.
 
IN ADDITION TO THE SEVERE THUNDERSTORM THREAT...THESE THUNDERSTORMS
HAVE HAD A HISTORY OF PRODUCING TORRENTIAL DOWNPOURS AND FLASH
FLOODING.
 
HEAVY RAINS WITH THIS THUNDERSTORM MAY CAUSE FLOODING OF SMALL
STREAMS AND UNDERPASSES VERY QUICKLY.  DO NOT DRIVE YOUR CAR INTO
AREAS WHERE THE WATER COVERS THE ROADWAY.  THE WATER MAY BE DEEPER
THAN YOU THINK.  IF CAUGHT IN RISING WATERS...ABANDON YOUR CAR
QUICKLY.  MOVE TO HIGHER GROUND.
 
 
 
&

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 6:05 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden55 min
Jul 14, 6:49 PM EDTFlash Flood WarningPHIBurlington, Camden116 min
Jul 14, 7:14 PM EDTFlash Flood WarningPHIGloucester, Salem91 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 1994Every severe thunderstorm warning in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.